package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.entity.Permissions;
import com.itheima.reggie.service.EmployeeService;
import com.itheima.reggie.service.PermissionsService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.List;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    @Autowired
    private PermissionsService permissionsService;

    /**
     * 员工登录
     */
    @PostMapping("/login")
    public R<Employee> login(@RequestBody Employee employee, HttpServletRequest request) {
        //1、将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        //2、根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);
        //3、如果没有查询到则返回登录失败结果
        if (emp == null) {
            return R.error("登录失败");
        }
        //4、密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(password)) {
            return R.error("登录失败");
        }
        //5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (!emp.getStatus().equals(1)) {
            return R.error("员工已禁用");
        }
        //6、登录成功，将员工id和该员工的权限存入Session中并返回登录成功结果
        List<Permissions> permissions = permissionsService.userPermissions(emp.getId());
        HttpSession session = request.getSession();
        session.setAttribute("employee", emp.getId());
        session.setAttribute("permissions",permissions);

        return R.success(emp);
    }

    /**
     * 退出登录
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        //清理Session中的用户id
        HttpSession session = request.getSession();
        session.removeAttribute("employee");
        //返回结果
        return R.success("退出成功");
    }

    /**
     * 添加员工
     */
    @PostMapping
    public R<String> save(@RequestBody Employee employee) {
        log.info("新增员工信息：{}", employee.toString());
        //先查询是否存在该用户;为了使得数据库压力减小,故使用异常处理器来进行判断；如果存在，那么后续的新增操作会产生异常
        //设置默认密码123456,md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        //调用mp的添加方法
        boolean flag = employeeService.save(employee);
        if (flag) {
            return R.success(null);
        }
        return R.error(null);
    }

    /**
     * 分页查询
     * @param page     页码
     * @param pageSize 每页的大小
     * @param name     分页查询的emp的name属性
     */
    @GetMapping("/page")
    public R<Page> selectAll(int page, int pageSize, String name) {
        log.info("page = {},pageSize = {},name = {}", page, pageSize, name);
        //构造分页构造器
        Page pageInfo = new Page(page, pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        //当name不为空时才会添加过滤条件；模糊查询
        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);
        //执行查询
        employeeService.page(pageInfo, queryWrapper);
        return R.success(pageInfo);
    }

    /**
     * 修改员工状态,还需要进行更新时间和更新人的修改
     */
    @PutMapping
    public R<String> updateEmpStatus(@RequestBody Employee employee) {
        //更新员工信息
        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }

    /**
     * 回显数据
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getEmpById(@PathVariable Long id) {
        Employee employee = employeeService.getById(id);
        return R.success(employee);
    }
}
